Question

Find the total number of atoms for each element present.

Answer 1

Answer:

So, if you are given the mass of an element, you use the periodic table to find its molar mass, and multiply the given mass by the reciprocal of the molar mass. This is Mass → Moles . Once you have moles, multiply by Avogadro's number to calculate the number of atoms. This is Moles → Atoms .

Step-by-step explanation:

A number of an atom of an element in the compound = number of mole of the element in compound x Avogadro's number.

For KClO3, the number of moles of K, Cl. and O are 1, 1, and 3 respectively.

Thus,

Number of atoms of 'K' =1×6.023×1023 

Number of atoms of 'Cl' =1×6.023×1023

Number of atoms of 'O' =3×6.023×1023 

Atomic mass of KClO3

Hence, No. of mole of compound =AtomicweightGivenweight

=122.5122.5=1 mole

Hence, It contains 1 mole of K atom 

1 mole of Cl atom 

and 3 mole of 0 atom.

Answer 2

Answer:

Na - 4

P - 3

O - 12

Ca - 4

Cl - 3

Hope it helps.